Headline Numbers

As of the latest CDC data release on September 10, 2020 there are:

35,625 new cases
- The state with the most cases is TX with 4,048
  - The county with the most cases is Harris County in TX with 723 new cases
- The record number of national cases per day is 80,444 on July 16, 2020
1,082 new deaths
- The record number of deaths per day is 3,153 on April 14, 2020

Where I live, in Somerville, MA, as of June 25, 2020 there are:

0 new cases
36 cases in the last two weeks
- Out of 984 cases overall
  - 31 Fatalities and
  - 895 Recoveries

Where my grandparents live, in Collier County, FL, as of September 10, 2020 there are:

25 new cases
720 cases in the last two weeks
- For a more detailed report, see http://ww11.doh.state.fl.us/comm/_partners/covid19_report_archive/state_reports_latest.pdf

Consequently, in the United States, there are now:

6,347,016 total cases
190,372 total deaths

Globally, as of the latest WHO data release on September 11, 2020, there are:

28,040,853 total cases
- 288,787 today
906,092 total deaths
- 6,116 today

Overall Covid Cases In The USA

Regions are defined as follows: Northeast (CT, ME, MA, NH, RI, VT, NJ, NY, PA), Midwest (IN, IL, MI, OH, WI, IA, KS, MN, MO, NE, ND, SD), South (AL, AR, DC, DE, FL, GA, KY, LA, MD, MS, NC, OK, SC, TN, TX, VA, WV) and West (AZ, CO, ID, NM, MT, UT, NV, WY, AK, CA, HI, OR, WA). The red line denotes the date that Health and Human Services (HHS) took over the production of data from the Center for Disease Control (CDC) on July 20, 2020.¹

US Cases Compared to World Cases

World Case Maps: Total Cases and Cases per Capita

Covid Cases in Somerville, MA and MA

Latest Cases in Boston Area (Today, One Week Ago, Two Weeks Ago)

Date	County Name	Cases	Deaths	New Cases	New Deaths
September 10, 2020	Middlesex County	28259	2094	84	5
September 03, 2020	Middlesex County	27823	2071	67	0
August 27, 2020	Middlesex County	27377	2062	81	4
September 10, 2020	Norfolk County	11232	1029	29	3
September 03, 2020	Norfolk County	11084	1021	17	3
August 27, 2020	Norfolk County	10942	1011	20	3
September 10, 2020	Suffolk County	24103	1113	89	2
September 03, 2020	Suffolk County	23712	1106	80	0
August 27, 2020	Suffolk County	23154	1105	90	4

New Covid Cases By State

The plot below shows the number of new COVID cases by state. Note that each figure has its own y axis; this is done so that trends can be seen within each state. Log scales can make the difference between 100 and 1000 cases hard to discern and a common y axis causes states like NY and CA to swamp states like NC. Negative new cases can occur when States revise their total number of cases downwards, as Hawaii did between June 30, 2020 and July 1, 2020.

COVID Cases per 1,000 Residents by State

This figure shows the number of COVID cases per 1,000.

Latest County Case Map

Latest County Death Map

Counties with the Most Cases Over Time

Date	State	County Name	Cases	Deaths
2020-09-10	CA	Los Angeles County	249859	6090
2020-09-10	FL	Miami-Dade County	162894	2789
2020-09-10	AZ	Maricopa County	136571	3133
2020-09-10	IL	Cook County	132963	5103
2020-09-10	TX	Harris County	112762	2385
2020-09-01	CA	Los Angeles County	242521	5829
2020-09-01	FL	Miami-Dade County	159059	2537
2020-09-01	AZ	Maricopa County	134004	2976
2020-09-01	IL	Cook County	126992	5065
2020-09-01	TX	Harris County	106595	2208
2020-08-01	CA	Los Angeles County	190693	4669
2020-08-01	FL	Miami-Dade County	121207	1647
2020-08-01	AZ	Maricopa County	119295	2089
2020-08-01	IL	Cook County	106131	4888
2020-08-01	TX	Harris County	72964	1288
2020-07-01	CA	Los Angeles County	105507	3402
2020-07-01	IL	Cook County	90911	4581
2020-07-01	NY	Queens County	65455	7059
2020-07-01	NY	Kings County	59742	7104
2020-07-01	AZ	Maricopa County	52266	817

Hospitalizations By State

Patients Currently in the ICU

Patients Currently on Ventilators

Cumulative Cases by County in the Northeast

Cumulative Cases by State Over Time

Cumulative Deaths by State Over Time

Daily Percent Positive Cases

According to the WHO the positive rate should be below 5%.² Days above the threshold are denoted in red, days below are in blue. Note that the variables currently used for these plots –positiveIncrease and negativeIncrease– are being phased out and will be replaced by positiveCasesViral and negativeCasesViral. Each dot represents the rolling average of tests within the previous week (this approach smoothes out trends such as fewer cases being reported on weekends).

Partisanship and COVID Cases

Variants of Select Figures

Week to Week Changes in COVID Cases

Confirmed Cases as a Percentage of State Population

The two sets of points are confirmed cases (black), and potential cases (grey) which are confirmed cases times ten. For herd immunity, typically 70-90% of a population needs immunity.³

Data Sources

Data for this report comes from:

The CDC Homepage https://www.cdc.gov/covid-data-tracker/index.html#county-map and https://usafacts.org/visualizations/coronavirus-covid-19-spread-map/, specifically:
- Confirmed COVID Cases https://usafactsstatic.blob.core.windows.net/public/data/covid-19/covid_confirmed_usafacts.csv
- Covid Deaths https://usafactsstatic.blob.core.windows.net/public/data/covid-19/covid_deaths_usafacts.csv
- County Population https://usafactsstatic.blob.core.windows.net/public/data/covid-19/covid_county_population_usafacts.csv
Covidtracker.com data (used by Johns Hopkins https://coronavirus.jhu.edu/us-map) https://covidtracking.com/api/v1/states/daily.csv
World Health Organization https://covid19.who.int/
Somerville City data https://somerville-dashboardcovid.trial.opendatasoft.com/pages/citysdashboard/

Different Counts from Different Data

See the difference between https://covidtracking.com/api/v1/states/daily.csv and https://usafacts.org/visualizations/coronavirus-covid-19-spread-map/

Covid Figures and Maps

Steven Rashin

September 11, 2020